length

Returns the length in characters of the value of EXPR. If EXPR is
omitted, returns length of $_
. Note that this cannot be used on
an entire array or hash to find out how many elements these have.
For that, use scalar@array
and scalarkeys%hash
respectively.

Note the characters: if the EXPR is in Unicode, you will get the
number of characters, not the number of bytes. To get the length
of the internal string in bytes, use bytes::length(EXPR)
, see
bytes. Note that the internal encoding is variable, and the number
of bytes usually meaningless. To get the number of bytes that the
string would have when encoded as UTF-8, use
length(Encoding::encode_utf8(EXPR)).

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